1/4 wave scopes

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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mdwmark
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1/4 wave scopes

Post by mdwmark »

It seem to me that being diffraction limited is not that important when viewing the sun in Ha.
I have tried to design the F/6 scopes with a singlet that is not aspherical and none of the designs make me happy.
At 50mm you can get to 1/4 wave at F/12 that looks good with simple lens, and at 80mm you need to be up at F/16-17 with singlets.
I must be missing something for the larger scopes.
If any one has any ray traces ,please post them I would like to see them.
Or it maybe that these systems where designed to be used at low power so that doesn't matter that much.
Any way I think this is the first post I have ever started
Mark W.


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swisswalter
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Re: 1/4 wave scopes

Post by swisswalter »

Hi Mark

congratulations to your first post you have ever started in here. Wish you a huge amount of ray traces


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